73 lines
1.4 KiB
C++
73 lines
1.4 KiB
C++
#ifdef DO_VIRTUAL_INHERITANCE
|
|
#define VIRTUAL virtual
|
|
#else
|
|
#define VIRTUAL
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
|
|
class Base
|
|
{
|
|
public:
|
|
Base(int val) : m_base_val (val) {}
|
|
virtual ~Base() {}
|
|
|
|
virtual void
|
|
forcast(int input) {
|
|
int future_val = m_base_val + input * 1;
|
|
printf("Forcasting %d\n", future_val);
|
|
}
|
|
|
|
protected:
|
|
int m_base_val;
|
|
};
|
|
|
|
class DerivedA : public VIRTUAL Base
|
|
{
|
|
public:
|
|
DerivedA(int val) : Base(val*2), m_a_val(val) {
|
|
printf("DerivedA::ctor()->\n");
|
|
printf("m_base_val=%d\n", m_base_val);
|
|
printf("m_a_val=%d\n", m_a_val);
|
|
}
|
|
virtual ~DerivedA() {}
|
|
|
|
private:
|
|
int m_a_val;
|
|
};
|
|
|
|
class DerivedB : public VIRTUAL Base
|
|
{
|
|
public:
|
|
DerivedB(int val) : Base(val), m_b_val(val*3) {
|
|
printf("DerivedB::ctor()->\n");
|
|
printf("m_base_val=%d\n", m_base_val);
|
|
printf("m_b_val=%d\n", m_b_val);
|
|
}
|
|
virtual ~DerivedB() {}
|
|
|
|
virtual void
|
|
forcast(int input) {
|
|
int future_val = m_b_val + input * 2;
|
|
printf("Forcasting %d\n", future_val);
|
|
}
|
|
|
|
private:
|
|
int m_b_val;
|
|
};
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
DerivedA* dA = new DerivedA(10);
|
|
DerivedB* dB = new DerivedB(12);
|
|
Base *array[2] = {dA, dB};
|
|
Base *teller = NULL;
|
|
for (int i = 0; i < 2; ++i) {
|
|
teller = array[i];
|
|
teller->forcast(i); // Set breakpoint here.
|
|
}
|
|
|
|
return 0;
|
|
}
|